Mister Rogers' Neighborhood
Episode 6
S1968 E6:
To prepare for his scientific endeavor, Rogers puts on a lab coat and compares various shells and shell-like objects, including a turtle shell, a conch shell, an armadillo's armored shell and a suit of armor. In the Neighborhood of Make-Believe, Bud Alder compares oil-based and water-based paints. After sharing his wisdom with X the Owl, X teaches Lady Elaine various bird names.